The patent concerns the use of dyes in laundry compositions, in particular a laundry composition comprising alkoxylated bis azo-dyes.
Brief outline of the case
The proprietor appealed the decision of the OD to revoke the patent for lack of sufficiency.
The OD concluded that a “process for preparation of the bis-azo dyes falling in the scope of claim 1 has not been disclosed in a manner sufficiently clear and complete that it can be carried out by the skilled person in the art”.